Window-sash lock



(No Model.)

J. GEISER.

WINDOW SASH LOOK. No. 343,580. Patented June 15, 1886.

UNITED STATES PATENT OFFICE.

JOSEPH GEISER, OF COVINGTON, KENTUCKY.

WlNDOW-SASH LOCK.

SPECIFICATION forming part of Letters Patent No. 343.580, dated June 15,1886.

Application filed February 15, 1886.

To all whom it may concern:

Be it known that I, JOSEPH GEIsER, a citizen of the United States,residing at Covington, in the county of Kenton and State of Kentucky,have invented certain new and useful Improvements in Window- Sash Locks;and I do hereby declare that the following is a full, clear, and exactdescription of the inven tion, which will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to letters of reference markedthereon, which form a part of this specification.

My invention consists in a special construction of sash-fastener adaptedfor locking the sash in position by friction, and it is applicable notonly to sashes which rise and fall,

but also to those which slide sidewise.

In the accompanying drawings, Figure 1 represents my improvedsash-fastener as applied to a sash which is adapted to rise and fall.Fig. Zrepresents the fastener as applied to a sash which is adapted toslide sidewise; Fig. 3, a detail showing an elevation of that platewhich is to be perniauentlyaffixed to a window sash or frame; and Fig. 4a plan of the friction-plate detached.

A is a plate provided with screw-holes, whereby it may be permanentlysecured by screws to the sash in such position that the slidingfriction-plate B may be forced against the casing b of the windowframe.The plate A has on its outer side a strong projecting part, a, throughwhich is a threaded hole, a, adapted for a screw, 0. One end of thisscrew is reduced and enters a hole, d, in the frictionplate B, and isupset'or headed, so that when the screw is turned in either direction itmay carry the plate B with it. At the other end is a handle, E, forturning the screw to move the friction-plate forward or back, asdesired. Guide rods or pins F, secured to the friction plate, and withtheir free ends so placed as to run in guides or grooves g in the parta, serve not only to keep the friction-plate in proper alignment withthe plate A, but also prevent its revolving when the screw is turned.

With a rising and falling sash the device is fastened on the uprightpart of the sash, (see Serial No. 191,967. (No model.)

Fig. 1,) so that the plate B may be forced against the casing of thewindow-frame. With asash arranged to slide sidewise the device may besecured in a similar manner to the lower part of the sash. (See Fig. 2.)

The device may, if desired, be'secured on the top rail of a lower sashof a window, and in such case the turning of the screw will project theplate B against the upper sash, instead of against the window-frame. Insome cases it may be found advisable to place one of the fasteners ateachside of a sash, especially if the sash be broader than usual.

The friction-plateBis of a length or breadth nearly equal to the lengthof plate A, and by 6 reason of its large area of surface is adapted totake a large purchase against the frame or sash against which it may bepressed, thus lessening the amount of tightening necessary for holdingup the sash. Th'eparallel rods F project back from thisplate B, one oneach side of the screw, the pins severally fitting in its appropriateguide-groove g in the part a of the plate A, these grooves 9 being alsoparallel, and 'one of them being on each side of 5 the part c. Thus thefriction-plate is positively precluded from accidental turning, and thisavoids any downward starting of the frame which such a turning wouldpermit, and thereby prevents the sudden dropping of a sash, so which isalmost certain to follow the initial downward start. This constructionalso avoids that damage to thepaint and woodwork which must necessarilyattend the use of small pressure devices like screw-heads, when they are8 pressed into and indent the wood before they can obtain a sut'ficienthold.

I claim- In combination, the plate A, havingathreaded part, a, audguide-grooves g, the friction- 0 plate B, having parallel guide-rods F,extending backward therefrom and fitting in said grooves, and theactuating-screw 0, connected to the plate B at a point between theguiderods, all as and for the purpose set forth.

JOSEPH GEISER.

Witnesses:

F. R. McCoRMIoK, E. J. JOHNSON.

